1 files changed, 80 insertions, 0 deletions
diff --git a/src/Env.php b/src/Env.php
new file mode 100644
index 0000000..34b9f1f
--- /dev/null
+++ b/src/Env.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Micropoly;
+
+use SQLite3;
+use Twig\Environment;
+use Twig\Loader\FilesystemLoader;
+use Twig\TwigFilter;
+use Twig\TwigFunction;
+
+class Env
+{
+    private array $config;
+
+    private function __construct() { }
+
+    private array $lazyLoaded = [];
+
+    private function lazy(string $ident, callable $callback)
+    {
+        if (!isset($this->lazyLoaded[$ident])) {
+            $this->lazyLoaded[$ident] = $callback();
+        }
+        return $this->lazyLoaded[$ident];
+    }
+
+    public static function fromConfig(array $config)
+    {
+        $env = new self;
+        $env->config = $config;
+        return $env;
+    }
+
+    public function documentRoot(): string { return "/"; }
+
+    public function twig(): Environment
+    {
+        return $this->lazy("twig", function () {
+            $loader = new FilesystemLoader($this->config["templates_path"]);
+            $env = new Environment($loader, [
+                "cache" => $this->config["templates_cache"],
+            ]);
+
+            $env->addFunction(new TwigFunction("url", function (string $url, ...$args) {
+                return $this->documentRoot() . sprintf($url, ...$args);
+            }, ["is_variadic" => true]));
+
+            $env->addFilter(new TwigFilter("search_escape", static function (string $s) {
+                $s = str_replace("\\", "\\\\", $s);
+                $s = str_replace("#", "\\#", $s);
+                $s = str_replace(" ", "\\ ", $s);
+                $s = str_replace("\t", "\\\t", $s);
+                $s = str_replace("(", "\\(", $s);
+                $s = str_replace(")", "\\)", $s);
+                return $s;
+            }));
+
+            return $env;
+        });
+    }
+
+    public function rawDbCon(): SQLite3
+    {
+        return $this->lazy("rawDbCon", function () {
+            return new SQLite3($this->config["sqlitedb"]);
+        });
+    }
+
+    public function db(): SQLite3
+    {
+        return $this->lazy("db", function () {
+            $db = $this->rawDbCon();
+            $db->exec("PRAGMA foreign_keys = ON");
+
+            (new Schema($db))->migrate();
+
+            return $db;
+        });
+    }
+}